Members of the Interdenominational Ministerial Alliance said Friday morning that leadership at the Baltimore City Police Department is lacking, and they're calling on Commissioner Anthony Batts to resign.

"It seems that no one in the Police Department can explain what happened," said the Rev. Alvin Gwynn Sr., president of the Interdenominational Ministerial Alliance of Baltimore.

He said the Police Department is "in disarray" and Batts has shown a "lack of viable leadership capabilities."

"I think he should step down immediately, it will help create change and the climate that's out there on the streets right now, and help us to understand where the problem really lies is in the leadership. The buck stops at the top of the Police Department," Gwynn said.

During a press conference Friday afternoon, Batts said of calls for his resignation, "That's not going to happen."

The mayor said when horribly tragic incidents happen, there is often a desire to say someone's got to pay, someone's got to go. She said what can't be ignored is the progress that is being made to reform the Police Department.

"Is this an unbelievable setback? Of course it is, and it's tragic. But I'm not going to throw away that work that we've done. I know it's going to be hard, but we're going to continue to press forward for even more progress," Mayor Stephanie Rawlings-Blake said.

The mayor said reforms have reduced harassment, excessive force claims and lawsuits against the Police Department.

After a closed-door session with members of Baltimore's faith-based community Friday, the mayor said she is determined to get answers in the investigation.

"I still want to know why the policies and the procedures for transport were not followed. I still want to know why none of the officers called for immediate medical assistance despite Mr. Gray's apparent pleas," Rawlings-Blake said.

The mayor, along with ministers, rabbis and community leaders, called for continued peaceful protests.

"Let us protest but let it be nonviolent protests, so that the legacy of the death of Freddie Gray is that a great city will become greater after this," said the Rev. Frank Reid, of Bethel AME Church.

"When one of us is in trouble, all of us are in trouble. When one of us is hurting, all of us are hurting," said the Rev. Alfred C.D. Vaughn, with the Sharon Baptist Church.

"(We will be here) to walk with you through the crisis and to assure you that when all the cameras are gone and the media have moved on to the next tragedy, we will be here to stand with you, to work to resolve the issues that have brought us to where we are," said Bishop Douglas Miles, with Koinonia Baptist Church.